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Interest in bean genetic resources of Central America has resumed because of disease pressures (e.g., web blight, BGMV) and limitations of current bean varieties. As most of the diversity in landraces has been explored, focus is now on the exploration of wild forms of the primary gene pool and wi...


Araya Villalobos, RodolfoGonzález Ugalde, W.G.Camacho Chacon, FSánchez Trejos, Maria P.Debouck, Daniel G.[Observations on the geographic distribution, ecology and conservation status of several phaseolus bean species in Costa Rica]Observations on the geographic distribution, ecology and conservation status of several phaseolus bean species in Costa Rica

The wild common bean (Phaseolus vulgaris) is widely but discontinuously distributed from northern Mexico to northern Argentina on both sides of the Isthmus of Panama. Little is known on how the species has reached its current disjunct distribution. In this research, chloroplast DNA polymorphisms ...


Chacón Sánchez, María I.Pickersgill, BDebouck, Daniel G.Arias, J.S.[Phylogeographic analysis of the chloroplast DNA variation in wild common bean (Phaseolus vulgaris L.) in the Americas]Phylogeographic analysis of the chloroplast DNA variation in wild common bean (Phaseolus vulgaris L.) in the Americas

A new species of Phaseolus (Legumi nosae, Phaseolinae) has been found in the montane forests of the Sierra de Talamanca in eastern Costa Rica, where it appears endemic. Distinctive traits include: radicant roots, purplish red internodes, veins of leaflets, primary bracts, inner face of stan dard,...


Torres González, Alba MarinaToro Chica, OrlandoDebouck, Daniel G.[Phaseolus talamancensis, a new wild bean species (leguminosae, phaseoline) from montane forests of eastern Costa Rica]Phaseolus talamancensis, a new wild bean species (leguminosae, phaseoline) from montane forests of eastern Costa Rica

The genus Phaseolus includes important cultivated species as well as wild species with diverse ecological adaptations. Characterization of the ecological adaptations of the wild species would be useful for improved understanding, conservation, and utilization of these genetic resources. Salinity ...


Bayuelo Jiménez, Jeannette SofiaDebouck, Daniel G.Lynch, Jonathan P.[Salinity tolerance in Phaseolus species during early vegetative growth]Salinity tolerance in Phaseolus species during early vegetative growth

Cassava (Manihot esculenta Crantz) is one of the most important sources of starch in the tropics. There is limited and contradictory information regarding cassava starch characteristics. The International Center for Tropical Agriculture (CIAT) holds in trust FAO's cassava germplasm collection. St...


Sánchez, T.Salcedo, ECeballos, H.Dufour, D.L.Mafla, G.Morante, NCalle, FPérez Velásquez, Juan CarlosDebouck, Daniel G.Jaramillo, GustavoMoreno, I.X.[Screening of starch quality traits in cassava (Manihot esculenta Crantz)]Screening of starch quality traits in cassava (Manihot esculenta Crantz)

A collection trip of native Phaseolus germplasm was carried out over a 15-day period in the provinces of Jujuy, Salta, Tucuman, and Catamarca (Argentina) within the alt. range of 700-2200 m.a.s.l. Seeds of 26 wild populations of Phaseolus vulgaris var. aborigineus and of other species were collec...


Debouck, Daniel G.[Recoleccion de germoplasma nativo de Phaseolus]Recoleccion de germoplasma nativo de Phaseolus

Schwartz, Howard F.Otto, KViteri, DMDebouck, Daniel G.Singh, Shree P.[Response of six wild Phaseolus Costaricensis accessions to seven bacterial, fungal, and viral diseases of common bean]Response of six wild Phaseolus Costaricensis accessions to seven bacterial, fungal, and viral diseases of common bean

Results are given from a Phaseolus germplasm field study carried out in Southern Nuevo Leon, Mexico: 143 samples of 8 different species. The presence of each one of the species in this part of the country is discussed. (CIAT)


Rodríguez C, M.Rodríguez T, S.Aguilar S., M.Debouck, Daniel G.[Phaseolus germplasm collection in Mexico]Phaseolus germplasm collection in Mexico

During a 3-wk. trip to western Guatemala to collect bean germplasm, 88 seed samples were collected, representing 10 species in different forms. The germplasm involves 3 cultivated species (coccineus, polyanthus, and vulgaris), the ancestral forms of coccineus, lunatus, and polyanthus, and 3 wild ...


Debouck, Daniel G.Soto D., J.J.[Recoleccion de germoplasma de Phaseolus (frijol) en el Occidente de Guatemala]Recoleccion de germoplasma de Phaseolus (frijol) en el Occidente de Guatemala

The results of 2 Phaseolus lunatus germplasm collections, carried out in the Depts. of Cajamarca and Amazonas (Peru), are discussed in terms of origin and domestication problems of this crop. (AS-CIAT)


Debouck, Daniel G.Linan J., J.H.[Observations on the domestication of Phaseolus lunatus L]Observations on the domestication of Phaseolus lunatus L

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